Flange connection structure

The utility model discloses a flange connection structure, including connecting the first ring flange and the second ring flange of connection at second pipeline tip at first pipeline tip, first ring flange and second ring flange phase -match, first ring flange are combined closely through many flange connecting bolt with the second ring flange and are in the same place, connection structure still binds round including the flange, the annular structure of flange hoop for matcing first ring flange and second ring flange periphery profile, the periphery at first ring flange and second ring flange is embraced to flange hoop, with the faying face circumference shutoff of first ring flange and second ring flange. It forms auxiliary buffering and sealing structure in flange faying face department, under the condition that the primary seal was damaged, can effectually block that the medium in the pipeline reveals, is at least to stop radial splash of medium or injection, be favorable to to the surrounding environmen